Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21F—WORKING OR PROCESSING OF METAL WIRE
  • B21F99/00—Subject matter not provided for in other groups of this subclass
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
  • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
  • B21C37/04—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
  • B21C37/045—Manufacture of wire or bars with particular section or properties
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21F—WORKING OR PROCESSING OF METAL WIRE
  • B21F1/00—Bending wire other than coiling; Straightening wire
  • B21F1/02—Straightening
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21F—WORKING OR PROCESSING OF METAL WIRE
  • B21F37/00—Manufacture of rings from wire
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21F—WORKING OR PROCESSING OF METAL WIRE
  • B21F37/00—Manufacture of rings from wire
  • B21F37/02—Manufacture of rings from wire of resilient rings, e.g. key-rings
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
  • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
  • F16L21/00—Joints with sleeve or socket
  • F16L21/08—Joints with sleeve or socket with additional locking means

Definitions

• Metal wire for drip ring Description Metal wire for drip ring, method for manufacturing metal wire for drip ring, manufacturing apparatus for metal wire for drip ring, method for manufacturing grip ring for pipe joint using metal wire, and pipe for same Manufacturing equipment for dalip rings for fittings and dalip rings for pipe fittings
• the present invention relates to a metal wire, and particularly to a pipe joint which is a connection fitting for connecting a tubular body, which does not require treatment of an end of the tubular body, prevents axial movement of a tubular body inserted from both sides, and connects the tubular body.
• a pipe joint which is a connection fitting for connecting a tubular body, which does not require treatment of an end of the tubular body, prevents axial movement of a tubular body inserted from both sides, and connects the tubular body.
• the present invention does not require treatment of the end of the tubular body, prevents axial movement of the tubular body inserted from both sides, and is used for a pipe fitting which is a connection fitting for connecting the tubular body.
• a pipe fitting which is a connection fitting for connecting the tubular body.
• Joints are used to interconnect tubular pipes that are often used in industrial equipment, and various types of structures have been proposed in the past in order to secure the tubular bodies to each other and to seal the joints. ing.
• As a structure with strong fixing means mainly a flange type, screw-in type, and welding type are often used, but the efficiency of piping work is low, and there is no danger of leakage due to improper installation. .
• a spring steel drip ring 2 made of stainless steel or steel and having a wedge-shaped groove 1 in the inner circumferential direction is used as a component of the pipe joint.
• the pipe joint provided with this grip ring is disclosed in Japanese Patent Application Laid-Open Publication No. 2001-5007782.
• 3 is a rotatable joint piece
• 4 is a fixed joint piece.
• a grip ring 2 is in close contact with the inner surface of the joint piece 3, and a locking piece 5 is engaged with one end of the grip ring 2. Is fixed by the following fastening mechanism.
• a rubber gasket 8 is in close contact with the inner surface of the joint piece 4.
• the inner diameter of the dalip ring 2 and the rubber gasket 8 is formed slightly larger than the outer diameter of the tubular body inserted into the joint.
• This grip ring was conventionally manufactured by the following method. That is, a metal wire having a predetermined shape is wound into a coil shape, a metal wire having a predetermined length is cut out from the metal coil, and the cut metal wire is “bent-processed” into a ring shape and bent into a ring shape. Both ends of the ring-shaped metal wire are ⁇ welded '' to make the processed metal wire into an annular shape, and ⁇ strain relief annealing '' is performed to remove the thermal distortion associated with welding. Using a lathe, etc.
• a ⁇ cutting process '' is performed to form a wedge-shaped groove
• a ⁇ weld cutout '' is performed to make a continuous annular metal wire rod a discontinuous one.
• the conventional method of manufacturing a grip ring requires many processing steps, and welding, strain relief annealing, and welding cutout are extra steps for wedge-shaped groove processing. It is not an essential step.
• the present invention has been made in view of such problems of the prior art, and an object of the present invention is to provide a low-cost metal wire for grip rings having good surface properties. Another object of the present invention is to provide a method capable of efficiently manufacturing the metal wire for a grip ring. Another object of the present invention is to provide an apparatus suitable for manufacturing the metal wire for a grip ring. Another object of the present invention is to provide a method for efficiently manufacturing a pipe joint dalip ring using a metal wire. It is a further object of the present invention to provide an apparatus suitable for producing the pipe joint dalip ring. An object of the present invention is to provide a low-cost pipe joint dalip ring having good surface properties. [Disclosure of the Invention]
• the most important feature of the present invention to achieve the above object is to continuously cut a metal wire. Because of this feature, it is possible to provide a low-cost metal wire having good surface properties and suitable as a grip ring material.
• the metal wire for a grip ring of the present invention is characterized in that it is obtained by unwinding a coil-shaped metal wire and performing continuous cutting on the unwound metal wire.
• the method of manufacturing a metal wire for a grip ring according to the present invention is characterized in that a coil-shaped metal wire is rewound and a continuous cutting process is performed on the rewound metal wire.
• the method for manufacturing a grip ring for a pipe joint includes rewinding a coil-shaped metal wire, subjecting the unwound metal wire to continuous cutting, and forming the cut metal wire into a ring. Processed into After that, it is cut into ring pieces of a predetermined length, and a cutting process is performed on both end faces of the ring piece of a predetermined length.
• the apparatus for producing a metal wire for a grip ring of the present invention is characterized by having a cutting device for performing continuous cutting on a metal wire.
• the apparatus for manufacturing a grip ring for a pipe joint includes: a cutting apparatus for performing a continuous cutting process on a metal wire; a ring processing apparatus for processing the cut metal wire into a ring shape; It has a cutting device for cutting a metal wire into ring pieces of a predetermined length, and a cutting device for performing a cutting process on both end surfaces of the ring piece of a predetermined length.
• the above-mentioned cutting apparatus is preferably provided with a shape correction unit having at least a pair of upper and lower shape correction rollers and at least a pair of left and right shape correction rollers.
• a shape correction unit having at least a pair of upper and lower shape correction rollers and at least a pair of left and right shape correction rollers.
• at least one of the rollers has at least one pair of cutting roller units having a cutting blade formed on the outer peripheral surface and a support roller at the other.
• the present invention is configured as described above, and has the following effects.
• a metal wire rod for a drip ring having good surface properties and low cost can be provided.
• a dalip ring for a pipe joint having a low cost and a good material yield can be obtained without requiring many processing steps or extra processing steps.
• a manufacturing method can be provided.
• FIG. 1 (a) is a side view of the grip ring
• FIG. 1 (b) is a cross-sectional view taken along the line BB of FIG. 1 (a)
• FIG. 1 (c) is a perspective view of the grip ring
• FIG. (D) is an enlarged sectional view taken along the line DD in FIG. 1 (a).
• FIG. 2 is a perspective view of a pipe joint using a grip ring.
• FIG. 3 is a schematic configuration diagram of a grip ring manufacturing apparatus.
• FIG. 4 is a side view of the cutting apparatus.
• FIG. 5 (a) shows the engagement relationship between the upper and lower shape correction rollers and the metal wire.
• FIG. 5 (b) is a diagram showing the engagement relationship between the left and right shape correcting rollers and the metal wire.
• FIG. 6 is a diagram showing an engagement relationship between a cutting roller and a metal wire.
• FIG. 7 is a schematic configuration diagram of a ring processing device.
• Fig. 8 (a) shows an embodiment in which a metal wire is clamped by upper and lower pressing rollers
• Fig. 8 (b) shows another embodiment in which a metal wire is clamped by upper and lower pressing rollers.
• FIGS. 9 (a) and 9 (b) are views showing a state where the upper and side portions of the metal wire are continuously cut.
• FIG. 10 is a diagram showing a state in which a metal wire is cut in multiple stages.
• FIG. 11 is a diagram showing a method of performing a cutting process so that a metal wire is not warped.
• reference numeral 9 denotes a metal wire wound in a coil shape
• 10 denotes a cutting device for unwinding a coil-shaped metal wire and continuously forming a wedge-shaped groove in the metal wire (for a drip ring).
• Metal wire rod manufacturing equipment 1 1 is a ring processing device that processes a metal wire rod with a wedge-shaped groove into a ring shape
• 1 is a ring-shaped metal wire rod that has been processed into a ring shape
• It is a shearing device that cuts into pieces and is incorporated in the ring processing device 11.
• 13 is for cutting both end faces of a ring piece of a predetermined length.
• Cutting equipment eg, milling machine. The details of the cutting device 10 are shown in FIG.
• the metal wire is used for a grip ring
• a stainless steel wire for a spring (particularly, SUS304-WPB according to JIS-G-4314).
• the tensile strength varies depending on the wire diameter, but is preferably from 500 to 200 N / mm 2 . In less than 5 0 ON / thigh 2 is the intensity shortage, exceeding 2 0 0 0 NZmm 2, there is a disadvantages that Kuku will insert the tubular body.
• the wire diameter of the metal wire for the grip ring can be 2 to 20 mm.
• the metal wire for grip rings is subjected to straightening (machine processing to straighten it by means of straightening rollers arranged vertically or horizontally) before winding it into a coil during continuous cutting, which results in deflection (straight straight line). Is preferably 2 OmmZm or less. If the value of the run-out exceeds 20 orchids / m, there is an inconvenience that a small-amplitude vibration is generated at the time of cutting to cause a cutting defect. In FIG.
• reference numeral 14 denotes a shape correction unit, which includes two pairs of upper and lower shape correction rollers 15, 15, and 16, 16 and two pairs of left and right shape correction rollers 17, 17, and 17. 18 and 18 are provided. The other one of the right and left shape correction openings 17 or 18 is on the back side of the paper. As shown in FIGS. 5 (a) and 5 (b), these shape correction rollers preferably have a shape along the outer shape of the metal wire 34 having a circular cross section.
• This shape correction device is composed of two pairs of upper and lower shape correction rollers and two pairs of left and right shape correction rollers, but is composed of one pair of upper and lower shape correction rollers and one pair of left and right shape correction rollers.
• the shape of the material to be corrected is corrected by passing the material between the roller rows. It is also possible to use a so-called mouth-to-roller, which is a method (in Fig. 4, 19 and 20 are an upper pressing roller and a lower pressing roller arranged in front of the cutting roller unit.
• the roller also preferably has a shape along the outer shape of the metal wire rod 34 having a circular cross section, similarly to the shape correction roller shown in FIG. 5 (a).
• 21 is a first cutting roller
• 22 is a first servo roller
• 23 is a second cutting roller
• 24 is a second support roller.
• two cutting roller units are provided.
• a cutting blade 25 for forming a wedge-shaped groove in the metal wire 34 is formed on the outer peripheral surface of the first cutting roller 21 and the second cutting roller 23.
• the first support roller 22 and the second support roller 24 also have a shape along the outer shape of the metal wire 34 having a circular cross section, similarly to the shape correction roller shown in FIG. 5 (a). Is preferred.
• two cutting rollers, a first cutting roller and a second cutting roller are provided. However, in some cases, the number of cutting rollers may be one, or three or more.
• reference numerals 26 and 27 denote an upper holding roller and a lower holding roller arranged behind the cutting roller unit. It is preferable that these upper and lower pressing rollers also have a shape that follows the outer shape of the metal wire 34 having a circular cross section, similarly to the shape correcting opening shown in FIG. 5 (a). Further, upper and lower pressing rollers can be provided between the first cutting roller 21 and the second cutting roller 23.
• reference numeral 28 denotes a motor
• 29 denotes an inverter.
• the speed of the motor 28 is controlled by the inverter 29.
• 30 is the timing belt
• 3 1 is the intermediate gear
• 3 2 is the transmission belt.
• 3 3 is an operation panel.
• the ring processing device for processing the metal wire 35 subjected to the wedge-shaped groove processing into a ring shape includes a metal wire introduction device 36, a first guide member 37, a first movable roller 38, A second movable roller 39 and a third movable roller 40 are provided. These movable rollers can be moved in the direction of the arrow by operating devices (not shown) in order to adjust the ring diameter.
• the metal wire manufactured by the apparatus for manufacturing a metal wire for a drip ring according to the present invention configured as described above is used for a pipe joint as follows using a ring processing device, a shearing device, and a cutting device. Can be processed into a grip ring.
• the metal wire wound in a coil shape is unwound, and the metal wire is continuously cut by a cutting device. That is, in FIG. 4, a coil-shaped curl is obtained by passing the unwound metal wire 34 through the shape correction unit 14. Further, the upper and lower pressing rollers 19 and 20 and 26 and 27 prevent the metal wire 34 from warping or warping, and the first support roller 22 and the second support roller 24 support the metal. The first cutting roller 21 and the second cutting roller 23 form a continuous wedge-shaped groove in the metal wire 34 while supporting the wire 34.
• the function of these press rollers is to adjust the pass line of the metal wire, to adjust the moving speed of the metal wire by adjusting the rotation speed of the lower press rollers 20 and 27, and to control the vibration associated with cutting. The effect of prevention can be expected.
• the clamping force of the metal wire by the upper and lower pressing rollers is preferably set to 10 NZ cm 2 or more.
• the clamping force is excessive, it is difficult to adjust the moving speed of the metal wire, and in some cases, the metal wire may be plastically deformed. Therefore, it is preferable to clamp at less than 100 NZ cm 2 .
• the contact method between the press roller and the metal wire the method that makes contact with the metal wire 34 on a curved surface, as shown in Fig. 5 (a), can clamp the metal wire most stably.
• the upper holding roller 41 and the lower holding roller 42 may be brought into contact with the metal wire 34 at a plurality of places, or as shown in FIG.
• the lower holding roller 44 and the metal wire rod 34 may be in point contact with each other.
• the distance between the center of the cutting roller and the centers of the pressing rollers before and after the cutting roller be short in order to expect the action of the pressing port as described above. At this point, if the length is too long, the pressing effect cannot be expected. Therefore, the distance between the center of the cutting roller and the centers of the pressing rollers before and after the cutting roller is preferably set to 300 mm or less.
• the metal wire having the wedge-shaped groove formed as described above is processed into a ring shape by the ring processing device.
• the metal wire 35 passes through the metal wire introduction device 36 and the first guide member 37, and then passes through the first, second, and third movable rollers 38, 39, and 40, respectively. It can be adjusted to any ring diameter by moving it in the viewing direction.
• the first movable roller 38 and the second movable roller 39 mainly act to adjust the ring diameter
• the third movable roller 40 mainly acts to reduce the variation in roundness, and It works to remove internal stress.
• the ring-shaped metal wire is cut into ring pieces of a predetermined length by a shearing device 12 incorporated in the ring processing device 11 shown in FIG.
• a cutting device 13 shown in Fig. 3 cuts both end faces of this ring piece. By performing the treatment, a grip ring 2 shown in FIG. 1 is obtained.
• the pipe joint dalip ring manufactured by the method of the present invention has good surface properties without problems such as surface oxidation and discoloration due to welding and strain relief annealing processes in the conventional manufacturing method.
• the metal wire 34 is cut from above, but as shown in Fig. 9 (a), the cutting roller 45 positioned above the metal wire 34 cuts the metal wire 34 above. After the machining, as shown in Fig. 9 (b), the cutting is performed by cutting rollers 46 on the side of the metal wire 34 so that the side of the metal wire 34 is also machined. Rollers can also be arranged. If necessary, as shown in FIG. 9 (b), after cutting the upper part and one side of the metal wire 34, the metal wire 34 is cut as shown in FIG. 9 (b). The other side of the metal wire 34 can also be cut by a cutting roller (not shown) arranged on the side opposite to the side.
• cutting of the metal wire 34 can be performed in multiple stages. In this way, if cutting is performed in multiple stages, the amount of cutting per operation can be reduced, and the deformation resistance of the metal wire is reduced. Therefore, the speed of the wire passing through the cutting device can be increased (the machining efficiency increases). (Note that the number of cutting steps is not limited to the three shown in Fig. 10, but may be changed to four as needed.) The above can also be applied.
• the metal wire 34 is firmly clamped from above and below with upper and lower pressing rollers 47 and 48.
• the metal wire 3 4 is cut by a cutting roller 49 provided on the side of the metal wire 3 4.
• Reference numeral 50 denotes a motor, and a driving sprocket 51 and a driven sprocket 52, which are directly connected to the motor 50, are connected by a belt 53.
• the motor 50 rotates, the sprocket 5 is rotated. The rotation is transmitted from 1 to the cutting opening 49 via the sprocket 52 and the transmission shaft 54 via the belt 53, and the metal wire 34 is continuously cut.
• the first cutting roller 21, the second cutting roller 23, and the upper pressing rollers 19 and 26 are drive rollers, and the other rollers are driven rollers.
• a drive pinch roller for pushing in the metal wire can be provided in front of the cutting device, and a drive pinch roller for extracting the metal wire can be provided in the rear of the cutting device.
• the driving pinch roller for pushing in the metal wire or the driving pinch opening for pulling out the metal wire there is an advantage that the drawing speed is stable.
• the ring processing device 11 is provided continuously after the cutting device 10, but the metal wire is continuously cut by the cutting device and wound into a coil. After taking out.
• the coil-shaped metal wire can be unwound and processed into a ring shape by a separately provided ring processing device, and then the ring-shaped metal wire can be cut into ring pieces of a predetermined length.
• the present invention is suitable as a drip ring material, and is suitable as an apparatus for producing a low cost metal wire having good surface properties.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Wire Processing (AREA)
• Lining Or Joining Of Plastics Or The Like (AREA)

Priority Applications (5)

Applications Claiming Priority (4)

Related Child Applications (2)

Publications (1)

Family

ID=26618034

Family Applications (1)

Country Status (7)

Cited By (1)

Families Citing this family (10)

Citations (3)

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• 2002
  • 2002-07-01 KR KR1020037002567A patent/KR100919234B1/ko active IP Right Grant
  • 2002-07-01 DE DE60214555T patent/DE60214555T2/de not_active Expired - Fee Related
  • 2002-07-01 AT AT02741374T patent/ATE338595T1/de not_active IP Right Cessation
  • 2002-07-01 EP EP02741374A patent/EP1402972B1/en not_active Expired - Lifetime
  • 2002-07-01 CN CNB028025032A patent/CN1232365C/zh not_active Expired - Fee Related
  • 2002-07-01 WO PCT/JP2002/006628 patent/WO2003004195A1/ja active IP Right Grant
• 2003
  • 2003-01-16 US US10/478,199 patent/US20040182123A1/en not_active Abandoned
• 2006
  • 2006-11-29 US US11/605,575 patent/US7296452B2/en not_active Expired - Fee Related

Patent Citations (3)

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